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1991 Mercruiser 3.0 - Starts, won(39)t stay running-gctid807892

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    1991 Mercruiser 3.0 - Starts, won(39)t stay running-gctid807892

    I just bought last week a 1991 Bayliner Capri 1850 with a Mercruiser 3.0 (Serial #: D428186) When I bought it, it fired up and ran in the guy's driveway on muffs. He had rebuilt the carburetor, installed a electric fuel pump prior to the mechanical pump, but it had not been in the water for a couple of years.

    A week later, I went to start it to get the oil warmed to change it and it won't stay running. It starts and runs for about 5-10 seconds at most, then dies. I'm going to do a complete tune up on it and see if that helps.

    However, while I was doing some initial troubleshooting, I found that the voltage at the coil was 5.5V. Searching tells me that it could be 12v or 6v depending on the ignition (I have a points ignition) . It has a purple wire coming to it, is that the resistor wire? What should the voltage be?

    1991 Bayliner Capri 1850
    Mercruiser 3.0L/Alpha !

    See if that Electric fuel pump wiring goes back to the starter & oil pressure switch...if so, it is possible that the NORMALLY OPEN switch is not closing.
    Joon, Kathy, Jaden & Tristan
    Uniflite 42 AC, DD 671N
    93 3058 sold
    92 2855 (day boat)
    91 Fourwinns 205 (lake boat)
    Longbranch WA
    Life is Good